i’ve seen something like this before, where the kernel holds the file handle open for the process so that it thinks the file is still there. i think it’s related to how the program closes the file but i don’t remember the details. restarting qbittorent will most likely fix it.
it looks sort of like a continuation of the beaker browser project. basically, a peer to peer browser that also serves content you have made to others using the browser. it’s a cute idea.